A magnet of total magnetic moment \({10^{ - 2}}\hat i\) A-m2 is placed in a time varying magnetic field, \(B\hat i\left( {\cos \omega t} \right)\), where B = 1 T and ω = 0.125 rad/s. The work done for reversing the direction of the magnetic moment at t = 1s is

A magnet of total magnetic moment \({10^{ - 2}}\hat i\) A-m2 is place

1.	A magnet of total magnetic moment \({10^{ - 2}}\hat i\) A-m2 is placed in a time varying magnetic field, \(B\hat i\left( {\cos \omega t} \right)\), where B = 1 T and ω = 0.125 rad/s. The work done for reversing the direction of the magnetic moment at t = 1s is
A.	0.01 J
B.	0.007 J
C.	0.014 J
D.	0.028 J
Answer» D. 0.028 J

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A magnet of total magnetic moment \({10^{ - 2}}\hat i\) A-m2 is placed in a time varying magnetic field, \(B\hat i\left( {\cos \omega t} \right)\), where B = 1 T and ω = 0.125 rad/s. The work done for reversing the direction of the magnetic moment at t = 1s is

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